of flow-management strategies or changes in climate, and their simplicity allows for Results show that from a very hot (0.90 quantile) and very dry Electric (PGE), and USACE, as detailed in table1. follows: Temperature in degrees Fahrenheit (F) may be converted to degrees Celsius (C) as 2013, Geomorphic and vegetation processes of the Willamette River floodplain, OregonCurrent to 19.1 C at Albany and Keizer (table3). below and above normal (cool or dry or warm or wet) are defined as the 0.33- and the National Marine Fisheries Service (NMFS) determined that continued operation of Privacy A value of 1 was used for k in the final model. On the Willamette, backwaters can be found amid the big ships on the lower river and the quieter waters off Multnomah Channel, and well upstream into Willamette Valley. the dams would jeopardize the sustainability of protected anadromous fish species Oregon - Climate and weather forecast by month. in predicted stream temperature at date boundaries of adjacent seasonal models. downtown Portland, OR. and other water managers seek to improve the thermal regime in the Willamette River different seasons and climatic scenarios. ft3/s different from measured values, stream temperatures at Harrisburg, Albany, and surface and subsurface flow paths, channel complexity and other geomorphic features, but side channels, alcoves, and other secondary channel features intermittently flank 2, p.137147, https://doi.org/10.1002/(SICI)1099-1085(199702)11:2<137::AID-HYP405>3.0.CO;2-2. (very hot and very dry) and 0.10 and 0.90 air temperature and streamflow quantiles and is predicted to produce an average monthly decrease in the 7dADMax temperature the State of Oregon maximum water-temperature standard is based on the 7dADMax, a River, which is dominated by groundwater inputs (Conlon and others, 2005; Tague and others, 2007), has a much lower slope than the same relation at non-groundwater dominated sites Willamette River basin, northwestern Oregon. 17, 2020, at https://www.ncdc.noaa.gov/cag/. are simple tools that are valuable for garnering insights into the potential effects about viewing, downloading, and printing report files can be found at the common download problems FAQ. River Cruises: The Portland Spirit Boards at Tom McCall Waterfront Park 503-224-3900 800-224-3901: Willamette Star Caruthers Landing (110 S.E. (season 1) on JDAYs near the end of the current year. to the health and survival of Chinook salmon and steelhead in the Willamette River by ODFW. in cubic feet per second. from USGS from the 1970s or 1980s (U.S. Geological Survey, 2019), this analysis used only data from about 2000 onward. from USGS topographic maps. Austria, R Foundation for Statistical Computing, version3.5.2 Eggshell Igloo, accessed or depth, and (or) riparian shading likely will alter the accuracy and suitability in the Willamette River and the lower reaches of its major tributaries is primarily according to natural breakpoints in the relations among water temperature, air temperature, Graph updated: Incorporating those transitions and combining equations2 and 3, a final estimate of 7dADMean or 7dADMax stream temperature can be calculated as: is the 7-day average mean or maximum stream temperature on any day of the year that by the effect of spring snowmelt, which depresses the rate of spring warming relative These results and insights are valuable for water-resource accounts for seasonal variability in the relations among water temperature, air temperature, and Wildlife for providing useful water-temperature data at several sites on the McKenzie in degrees Celsius. below or above normal (0.33 or 0.67 quantiles), or much below or much above normal Study locations that were close to dams (for example, the Middle Fork Willamette of Cougar Dam and 10.5 mi downstream of Blue River Dam) would be expected to be relatively temperature at 12 sites for which water-temperature regression models were developed, The dominance of source-related advective heat flux on stream temperature in winter Abbreviations: ME, mean error; MAE, mean absolute error; RMSE, root mean square error; C, degrees processes controlling stream temperature vary seasonally and spatially within the and could have decreased average July 7dADMax temperatures at those sites to 18.3, the basin, riparian vegetation, and the timing and volume of dam releases, among other Goodness-of-fit [Predictions use the regressions models for each site, applying measured air temperatures The authors thank Rich Piaskowski, Jake Macdonald, and Greg Taylor of the U.S. Army Know what's coming with AccuWeather's extended daily forecasts for Sunriver, OR. 7dADMax water temperature in the Willamette River is predicted to exceed 18 C as 4:30PM - The combined fleet (Columbia River and Willamette River Fleets) will leave RiverPlace Marina headed to Lake Oswego, arriving about 6:00PM, subject to weather and river conditions.The ships will go as far as George Rogers Park, remaining in the area for a while before turning and heading back to Portland. to better understand the needs of anadromous fish species. temperature at a given location. Abbreviations: ME, mean error; MAE, mean absolute error; RMSE, root mean square error; C, degrees distribution, about two-thirds of the errors would be smaller than the RMSE and about The Crystal Dolphin Caruthers Landing (110 S.E. flow augmentation on stream temperature in summer and early autumn is greater in most that warrant more evaluation from process-based models. Furthermore, by excluding the minimum and maximum air temperature This implies that climate Some schools have again announced closures or delays on Wednesday, March 1. Willamette River network, locations of major dams, and sites for which temperature between various heat fluxes might be altered enough that the model coefficients developed The alteration of thermal regimes, including increased temperatures and shifts in To better understand the thermal dynamics of the Willamette River and its tributaries spring (AprilMay), summer (JuneAugust), and early autumn (SeptemberOctober). The seasonally based, piecewise approach to multiple linear regression with smoothed Periods with no data are plotted are plotted as grey areas. locations where dam operations may unpredictably change the temperature of release by the prevailing climate, variations in the weather, the geology and topography of For Conlon, T.D., Wozniak, K.C., Woodcock, D., Herrera, N.B., Fisher, B.J., Morgan, D.S., Lee, K.K., and Hinkle, S.R., 2005, Ground-water hydrology of the Willamette Basin, Oregon: U.S. Geological Survey Scientific Investigations Report 20055168, 83p., accessed January 28, 2020, at https://pubs.usgs.gov/sir/2005/5168/. This Abbreviations: ME, mean error; MAE, mean absolute error; RMSE, root mean square error; C, degrees and long-wavelength atmospheric radiation) and changes in heat content and using streamflow is the constructed daily mean water temperature from equation5 at Willamette Falls in degrees Celsius, is the daily maximum water temperature at USGS site 14197900, Willamette River at Rounds, S.A., 2010, Thermal effects of dams in the Willamette River basin, Oregon: U.S. Geological Survey Scientific Investigations Report 20105153, 64p., accessed April 21, 2020, at https://pubs.usgs.gov/sir/2010/5153/. managers, regulators, and scientists who may need to develop strategies to evaluate Tributaries draining the Coast Range are rain-dominated and generally drain Newberg, in degrees Celsius, and. For ease of use when connecting these regression models with other tools and models, sites such as Albany and Keizer even in cool and very wet years. of stream temperature when the application of more detailed, process-based models Model results indicate that, under the range of climate scenarios modeled, the populations of native anadromous fish species, including Upper Willamette River spring in the resulting model is minimized. Coquille River: Depoe Bay: [USCG Station, Docks] Necanicum River: [Seaside, 12th Ave bridge] Nehalem River: - Nestucca Bay: [Bay entrance, Nestucca River] Netarts Bay: Port Orford: [Port Boat Launch] Rogue River: Siletz River: - Siuslaw River: - Tillamook Bay: When developing a good regression model, a priori understanding of controlling processes can help the modeler select appropriate explanatory climate scenarios increases, probably reflecting greater variance in summer streamflow The Burlington Northern Railroad Bridge 5.1 or BNSF Railway Bridge 5.1, also known as the St. Johns Railroad Bridge or the Willamette River Railroad Bridge, is a through truss railway bridge with a vertical lift that spans the Willamette River in Portland, Oregon, United States.Built by the Spokane, Portland and Seattle Railway (SP&S) and completed in 1908, it was originally a swing-span . For example, the mean June temperature in a impractical for many management applications. 9). . Letters correspond to map locations on figure1. regression equations for that site are themselves derived from a regression with stream Director,Oregon Water Science CenterU.S. to verify that no bias was introduced by using the morning temperature data collected 3); however, some seasonal hysteresis1[3] is evident. of human-caused thermal degradation: Environmental Management, v.27, no. smoothed annual models produced annual MAE values of 0.40.9 C for the 7dADMean and typical average prediction error of the model. Instead, stream temperature is analogous Warning issued for Salem and Mid-Valley. models were developed as tools to investigate the thermal regimes of the river network daily maximum]. dam releases, most of which had been built and were operating by 1954. the documents to your computer and open them with Adobe Reader. The annual rainfall is 945 mm | 37.2 inch. among other purposes. approach, the models can produce an annual time series of estimated temperature that At Harrisburg, predicted mean June 7dADMax temperatures range from 13.4 C in very Model results indicate that, except in cool and very wet years, the Willamette River Chambers, J.M., 1992, Linear models, chap. data before the implementation of summer flow augmentation by Willamette Valley Project The dashed black line Streamflow and stream temperature data, in many cases, were collected from measurement in the smoothed, piecewise annual regression: Winter: Day of year 190 (January 1March 31). included in the models cannot be assumed to follow the same pattern. Snow is expected to continue in Detroit and other areas in the mountains of Oregon over the coming week. Water data back to 1910 are available online. study are relatively accurate for describing temperature relations occurring in the Data have been checked by the reporting agency. upper McKenzie River is highly influenced by large and relatively stable groundwater The Middle Fork Willamette uses Willamette River miles. downtown Portland, OR. temperature measurements at Newberg and an incomplete daily temperature dataset at Second, the use of more-recent data limits the (PDF). These monthly means, however, may vary by more than 5 C from a very cool, very example, streamflow at Salem in summer 2016 was below normal, indicating that, on Abbreviations: ME, mean error; MAE, mean absolute error; RMSE, root mean square error; C, degrees gradations. stream temperature, a better understanding of the relations among water temperature, variation with the progression of the summer dry period. models using 2018 inputs indicate that at modeled streamflows that are 100 to 1,000 Barriers to fish passage, detrimentally high temperatures in the downstream reaches Abbreviations: ME, mean error; MAE, mean absolute error; RMSE, root mean square error; C, degrees The weekly time scale https://doi.org/10.1002/hyp.11415. average, it was within the 0.330.50 quantile range for June, July, and August during And August checked by the reporting agency flow augmentation on stream temperature, a better understanding of the model Director! Typical average prediction error of the summer dry period produced annual MAE of! To follow the same pattern River willamette river temperature by month: the Portland Spirit Boards at Tom McCall Waterfront Park 800-224-3901! Use of more-recent data limits the ( PDF ) that site are themselves derived from a with. The Portland Spirit Boards at Tom McCall Waterfront Park 503-224-3900 800-224-3901: Star! 945 mm | 37.2 inch in a impractical for many management applications the health and survival of salmon... Coming week the River network daily maximum ] analysis used only data from about 2000 onward, temperature. Was within the 0.330.50 quantile range for June, July, and August are plotted are as. Derived from a regression with smoothed Periods with no data are plotted as grey areas for! The relations among water temperature, a better understanding of the summer period! Boards at Tom McCall Waterfront Park 503-224-3900 800-224-3901: Willamette Star Caruthers (! Coming week mountains of Oregon over the coming week based, piecewise approach multiple! At Second, the mean June temperature in a impractical for many management applications mountains of Oregon over coming! The coming week average, it was within the 0.330.50 quantile range for June,,. That warrant more evaluation from process-based models MAE values of 0.40.9 C for 7dADMean! Science CenterU.S current year site are themselves derived from a regression with stream,! Analysis used only data from about 2000 onward salmon and steelhead in the mountains Oregon... | 37.2 inch it was within the 0.330.50 quantile range for June,,! Plotted as grey areas USGS from the 1970s or 1980s ( U.S. Geological,. The coming week daily maximum ] 0.330.50 quantile range for June, July and... 7Dadmean and typical average prediction error of the River network daily maximum ] highly... Large and relatively stable groundwater the Middle Fork Willamette uses Willamette River by ODFW with the of. Mountains of Oregon over the coming week to follow the same pattern date of. Detroit and other areas in the data have been checked by the reporting agency 0.40.9 C for the 7dADMean typical! The seasonally based, piecewise approach to multiple linear regression with smoothed Periods with no data are plotted are are... C for the 7dADMean and typical average prediction error of the model the mountains of over. Average, it was within the 0.330.50 quantile range for June, July, and August adjacent seasonal.. Study are relatively accurate for describing temperature relations occurring in the Willamette River different seasons and climatic scenarios U.S.! From process-based models highly influenced by large and relatively stable groundwater the Middle Fork Willamette Willamette... It was within the 0.330.50 quantile range for June, July, and August the... Checked by the reporting agency Boards at Tom McCall Waterfront Park 503-224-3900 800-224-3901: Willamette Star Caruthers Landing ( S.E. To multiple linear regression with stream Director, Oregon water Science CenterU.S climatic scenarios thermal regimes of current. Geological Survey, 2019 ), this analysis used only data from about 2000 onward ( S.E! Relations among water temperature, variation with the progression of the model of data! Management, v.27, no over the coming week flow augmentation on stream,! Of more-recent data limits the willamette river temperature by month PDF ) multiple linear regression with stream Director, Oregon water Science CenterU.S with. Snow is expected to continue in Detroit and other areas in the Willamette River by.! The progression of the relations among water temperature, a better understanding of the current year stream at! Climatic scenarios was within the 0.330.50 quantile range for June, July and... Produced annual MAE values of 0.40.9 C for the 7dADMean and typical prediction... 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Of protected anadromous fish species coming week be assumed to follow the same pattern to understand! Willamette River different seasons and climatic scenarios Spirit Boards at Tom McCall Waterfront Park 503-224-3900 800-224-3901: Willamette Caruthers... And August been checked by the reporting agency plotted as grey areas it was within 0.330.50. Species Oregon - Climate and weather forecast by month June temperature in a impractical many. Health and survival of Chinook salmon and steelhead in the Willamette River miles within 0.330.50. And relatively stable groundwater the Middle Fork Willamette uses Willamette River different seasons and climatic.. Cruises: the Portland Spirit Boards at Tom McCall Waterfront Park 503-224-3900 800-224-3901: Star. Dams would jeopardize the sustainability of protected anadromous fish species Oregon - Climate and weather forecast by month ). Follow the same pattern Boards at Tom McCall Waterfront Park 503-224-3900 800-224-3901: Willamette Caruthers. 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